外部js文件 .js 如何调用php文件中的变量
假如有一个init.js文件，想要调用index.php文件中的$language变量，该怎么用，谢谢
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将$language写入html页面，如
js获取：var lang = document.getElementById("lang").innerHTML;
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其实js和html,css是一样的东西，你完全可以让外部js文件由php动态生成。
但是你的需求有点绕,就是想要index.php里计算得到的language，那么其实只要index.php将这个变量放在index.php生成页面的某个位置（script标签里的一个变量/任意dom node的一个属性），让init.js在onload之后去取来用就行了。
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方法有的是，关键是你那边需求合不合适。
你甚至可以存在session里，然后所有js文件都做成php的，让js.php读session。
再简单点，做个独立的php接口，AJAX直接去拿SESSION里的数据。
再简单到死，直接index.php发COOKIE，JS直接从document.cookie里拿值。
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